What is the term for the thick, white, woolly coat newborns possess before developing blubber?

Answer

Lanugo

Newborn grey seal pups are covered in lanugo, a thick, white, woolly coat that is essential for insulation on land or ice before they develop sufficient blubber.

What is the term for the thick, white, woolly coat newborns possess before developing blubber?
animalmammalmarineadaptationseal